CVE-2025-4476

EIP tracks 1 public exploit for CVE-2025-4476. PoCs published by soltanali0.

AI-analyzed exploit summary This repository contains a functional Python script that sends HTTP GET requests with an oversized Authorization: Basic header to trigger header-parsing issues, specifically targeting CVE-2025-4476 in libsoup. The script allows customization of payload length, request count, and delay, and supports both HTTP and HTTPS targets.

A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious HTTP server. If a user's application using the vulnerable libsoup library connects to this malicious server, it could result in a denial-of-service. Successful exploitation requires tricking a user's client application into connecting to the attacker's malicious server.